public class PL0_Instruction {
	public PL0_Machine_Function f = null; 	// function code: lit,opr,lod,sto,cal,inc,jmp,jpc
	public int l = 0;						// level, between 0 and levmax
	public int a = 0;						// between 0 and amax

	public PL0_Instruction (PL0_Machine_Function f, int l, int a) {
		this.f = f;
		assert(0 <= l);
		assert(l <= 3);
		this.l = l;
		assert(0 <= a);
		assert(a <= 255);
		this.a = a;
	}
}